Riot Impact Challenge

Simply put, because everything I wrote before got deleted. Will this "Riot Impact Challenge" ever end? Because I really want that Jinx poster and I really want to donate to charity on the same hand. So if it ends once Worlds is over then my donation amount won't be as much lol. So basically, is there a deadline to donate?

Edit: I am aware that there is 20 days left. But will I be able to donate after the 20 days?